<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Construct a new ObjectId</title>
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-base.css" />
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-medium.css" />

 </head>
 <body class="docs"><div class="navbar navbar-fixed-top">
  <div class="navbar-inner clearfix">
    <ul class="nav" style="width: 100%">
      <li style="float: left;"><a href="class.mongodb-bson-objectid.html">« MongoDB\BSON\ObjectId</a></li>
      <li style="float: right;"><a href="mongodb-bson-objectid.gettimestamp.html">MongoDB\BSON\ObjectId::getTimestamp »</a></li>
    </ul>
  </div>
</div>
<div id="breadcrumbs" class="clearfix">
  <ul class="breadcrumbs-container">
    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="class.mongodb-bson-objectid.html">MongoDB\BSON\ObjectId</a></li>
    <li>Construct a new ObjectId</li>
  </ul>
</div>
<div id="layout">
  <div id="layout-content"><div id="mongodb-bson-objectid.construct" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">MongoDB\BSON\ObjectId::__construct</h1>
  <p class="verinfo">(mongodb &gt;=1.0.0)</p><p class="refpurpose"><span class="refname">MongoDB\BSON\ObjectId::__construct</span> &mdash; <span class="dc-title">Construct a new ObjectId</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-mongodb-bson-objectid.construct-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">final</span> <span class="modifier">public</span> <span class="methodname"><strong>MongoDB\BSON\ObjectId::__construct</strong></span>(<span class="methodparam"><span class="type">?</span><span class="type"><span class="type">string</span><span class="type"></span></span> <code class="parameter">$id</code><span class="initializer"> = <strong><code>null</code></strong></span></span>)</div>

 </div>


 <div class="refsect1 parameters" id="refsect1-mongodb-bson-objectid.construct-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt>
<code class="parameter">id</code> (<span class="type">string</span>)</dt>

    <dd>

     <p class="para">
      A 24-character hexadecimal string. If not provided, the driver will
      generate an ObjectId.
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 errors" id="refsect1-mongodb-bson-objectid.construct-errors">
  <h3 class="title">错误／异常</h3>
  <ul class="simplelist">
   <li class="member">Throws <span class="classname"><a href="class.mongodb-driver-exception-invalidargumentexception.html" class="classname">MongoDB\Driver\Exception\InvalidArgumentException</a></span> on argument parsing errors.</li>
   <li class="member">Throws <span class="classname"><a href="class.mongodb-driver-exception-invalidargumentexception.html" class="classname">MongoDB\Driver\Exception\InvalidArgumentException</a></span> if <code class="parameter">id</code> is not a 24-character hexadecimal string.</li>
  </ul>
 </div>



 <div class="refsect1 examples" id="refsect1-mongodb-bson-objectid.construct-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-1385">
   <p><strong>示例 #1 <span class="function"><strong>MongoDB\BSON\ObjectId::__construct()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />var_dump</span><span style="color: #007700">(new&nbsp;</span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">BSON</span><span style="color: #007700">\</span><span style="color: #0000BB">ObjectId</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(new&nbsp;</span><span style="color: #0000BB">MongoDB</span><span style="color: #007700">\</span><span style="color: #0000BB">BSON</span><span style="color: #007700">\</span><span style="color: #0000BB">ObjectId</span><span style="color: #007700">(</span><span style="color: #DD0000">'000000000000000000000001'</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

   <div class="example-contents"><p>以上例程的输出类似于：</p></div>
   <div class="example-contents screen">
<div class="cdata"><pre>
object(MongoDB\BSON\ObjectId)#1 (1) {
  [&quot;oid&quot;]=&gt;
  string(24) &quot;56732d3dda14d81214634921&quot;
}
object(MongoDB\BSON\ObjectId)#1 (1) {
  [&quot;oid&quot;]=&gt;
  string(24) &quot;000000000000000000000001&quot;
}

</pre></div>
   </div>
  </div>
 </div>



 <div class="refsect1 seealso" id="refsect1-mongodb-bson-objectid.construct-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member"><a href="https://www.mongodb.com/docs/manual/reference/bson-types/#objectid" class="link external">&raquo;&nbsp;ObjectId Reference</a></li>
   <li class="member"><a href="https://www.mongodb.com/docs/manual/reference/bson-types/#objectid" class="link external">&raquo;&nbsp;BSON Types: ObjectId</a></li>
  </ul>
 </div>


</div></div></div></body></html>